In this paper, a new type of microwave microfluidic sensor is presented, using three separate half wave microstrip resonators with a common junction. The sensor comprises three parallel resonators with resonant frequencies of 2.5, 3.5, and 4.5 GHz. This sensor exhibits all the usual advantages of microwave resonant methods for dielectric liquid characterization, such as high precision, accuracy, and sensitivity, but here also over a wideband of frequencies. The resonators have common input and output ports. The sensor was tested using several types of liquids, including water, methanol, ethanol, and chloroform, and experimental results are in excellent agreement with the simulation results.

中文翻译：

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多谐振器，用于液体表征的微波微流体传感器

在本文中，提出了一种新型的微波微流传感器，它使用三个具有公共结的独立半波微带谐振器。该传感器包括三个并联谐振器，谐振频率分别为2.5、3.5和4.5 GHz。该传感器展现了微波谐振方法用于介电液体表征的所有通常的优势，例如高精度，准确性和灵敏性，但在宽频带上也是如此。谐振器具有公共的输入和输出端口。使用多种类型的液体（包括水，甲醇，乙醇和氯仿）对传感器进行了测试，实验结果与模拟结果非常吻合。